the trial of jodi arias. about to conclude as a final witness prepares to take the stand. >>> and remarkable night last night, special interview, amanda knox sitting with diane sawyer speaking about her four-year ordeal in an italian prison. she now joins us live. she'll be sitting down with robin in just moments. quite a morning. >> also ahead, one of the biggest companies, my yahoo!'s ma rhys ya mihys -- marissa may6 weeks of paid maternity leave possible. >>> the final stretch for the jodi arias trial. dozens of witnesses, hundreds of questions. the last testimony today closing arguments start tomorrow and abc's ryan owens is back with all the latest. >> reporter: could today finally be it? after four months, 36 witnesses, is this the last day of testimony in the jodi arias murder trial? that's what the judge promised the jury last week, warning today might be a marathon. >> we are going to stay here until we finish. >> reporter: on tap today, yet another set of dueling psychologists with very different op